1950 |
78%
|
1965 |
80%
|
2007 |
80%
|
1980 |
70%
|
1971 |
79%
|
1966 |
81%
|
1968 |
81%
|
1967 |
81%
|
1954 |
77%
|
1958 |
64%
|
1954 |
59%
|
1960 |
76%
|